Aztecs used the roots of the yucca plant for soap.
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Soap is made using animal fat or plant oils.
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The reason why the plant die is:
The plant may die when you put soap in the plant because
soap kills germs, aphids and other pest. If you put large
amounts of soaps
the chemically will burns the leaves.
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Lux soap does not contain pig fat. Lux soap contains natural
plant oils such as jojoba, cocoa butter and Shea butter. The soap
also relies on natural plant fragrances instead of animal fats.